Instead of finding an object in the Values tab of the Objects tree, you may query an object from the command line in the GRT shell. For example, in the code following the comment -- Set object mappings and do migration a mappingDefaults object is created by the grtV.setGlobal method.

To see that this method has executed successfully enter the following command in the GRT shell:

/ > print(grtV.getGlobal("/migration/mappingDefaults"))

This should output a listing of the mapping defaults as shown in your script file. The results will vary depending upon the objects you have chosen to migrate. However, in all cases you should see a schema mapping.

Beneath the -- update _ids comment the migration methods are copied to a local variable and then executed.